FERTILIZATION 



139 



is formed either wlaolly or partially covering the testa. 

 This coat is known as the aril. In litchi and ansphal 

 or Bastard Litchi, the edible portion wholly covering 

 the seeds is the aril. Mace or jaitri is the partial aril 

 of the seeds of jayphal or Nutmeg (fig. 124, 2). The 



Fig. 124. — I, Nutmeg Plant or Jayphal iMyristicafragrans). 2, Fruit, showing 

 seed with mace (jaitri), 3, Section of seed. 



white cushion at one end of Castor-oil seeds (see 

 fig. 7), the heart-shaped white patch on the seeds 

 of shib-jhul {Cardiospermum Halicacabum), are in- 

 stances of partial aril. The minute seeds of shalook 

 also are covered with an aril. 



The structure of the ovule, and of the seed formed 

 from it after fertilization, as described above, applies 

 to Angiospermia. Gymnospermic ovules and seeds 



